NC0038377_Other Agency Documents_20230531

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
May 31 st, 2023
Jason Talbott
Mayo Steam Plant
10660 Boston Road
Roxboro, NC 27574
NORTH CAROLINA
Environmental Quality
Subject: Review of Duke Energy's Mayo Steam Electric Plant (NC0038377): Environmental
Monitoring Report (2022).
Dear Mr. Talbott:
Thank you for your submission of the aforementioned document. Based on a review of the
information provided to us, we find fisheries data are consistent with historic trends for all trace
elements (i.e., Hg, Se, As) and are all below State and Federal screening values.
In addition, based on a review of the limnological parameters provided to us, we similarly find
that nutrient concentrations observed by Duke Energy remain consistent with those reported
previously and with values measured by DWR from routine lake monitoring efforts in the
past. Selenium concentrations in this reservoir remain low overall, and the concentration trends
of higher values near the outfalls remains consistent with those measured by DWR. Physical
parameters (i.e., dissolved oxygen, water temperature, pH and conductivity) were also within
ranges observed by DWR.
If you have any questions regarding these comments, please do not hesitate to contact.
me.
Sincerely,
Chris Johnson
Chief, Water Sciences Section
Cc: Scott Vinson, Regional Supervisor (Raleigh Regional Office)
Sergei Chernikov, Complex Permitting Unit
D E Q Jl North Carolina Department of Environmental Quality I Division of Water Resources
!/ 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NoarHcnaouNa
Department of Enviroamemal oaaI;� 919.707.9000